炭质板岩隧道大变形控制施工技术  

Construction Technology for Large Deformation Control of Carbonaceous Slate Tunnels

作　　者：余春模 孙慕楠 YU Chunmo;SUN Munan(Sinohydro Bureau 7 Co.,Ltd.,Chengdu Sichuan 610213)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213

出　　处：《四川水力发电》2024年第5期21-23,70,共4页Sichuan Hydropower

摘　　要：隧道工程建设中,软岩大变形是一种常见的地质灾害,这种灾害的出现往往会导致隧道结构的破坏,进而影响到隧道的正常使用。软岩大变形问题通常是由于软岩的强度和稳定性不足引起的[1]。某铁路隧道开挖后揭示的围岩为陡倾极薄层板岩、千枚岩、炭质板岩等不良地层,其岩体极为破碎,岩石抗压强度低,变形往往持续时间长,若采取的支护措施不到位极易发生侵限情况[2]。针对该铁路隧道已陆续出现一、二级软岩大变形的段落,为了进一步提高软岩大变形应对处置的及时性和有效性,保障隧道施工安全,对施工现场实施的隧道软岩大变形分级判识标准及变形控制措施进行了总结,旨在指导现场施工,防止隧道变形严重甚至侵限的现象发生。In tunnel construction,large deformation of soft rock is a common geological disaster.The occurrence of such disasters often leads to the destruction of the tunnel structure,which in turn affects the normal use of the tunnel.The problem of large deformation of soft rock is usually caused by the lack of strength and stability of soft rock[1].After the tunnel is excavated,it is revealed that the surrounding rock is a steeply inclined extremely thin-bedded slate,phyllite,carbonaceous slate and other undesirable strata,the rock mass is extremely broken,the rock compressive strength is low,the deformation often lasts for a long time,and the support measures are not in place,which is very prone to erosion[2].In view of the sections of the railway tunnels where first and second level soft rock large deformations have occurred one after another,in order to further improve the timeliness and effectiveness of the response and disposal of large deformation of soft rock and ensure the safety of tunnel construction,this paper summarizes the classification and identification standards and deformation control measures of large deformation of soft rock in tunnels,so as to guide on-site construction and prevent the occurrence of serious tunnel deformation and even encroachment.

关 键 词：炭质板岩 隧道 大变形 分级判识 变形控制 施工技术 

分 类 号：U25[交通运输工程—道路与铁道工程] U215.7